Featuring an FM tone generator, FM Essential is a synthesizer app for the iPhone and iPad that provides for real-time synth performances and also lets you edit voices.

-FM sound
・Tone Generator: FM
・Part: 1
・Polyphony: 16
・Preset Voice: 271
・Arpeggiator patterns: 64
・Chord pads: 20
・Scales: 25

-Drum Part
Tone Generator: Audio
Part: 1
Drum Pad: 16
Drum Pad Set: 3

Plug into MX!
-You can play full 271 voices and voice store function if you connect your iOS with Yamaha music synthesizer MX BK/BU series.

Effects/EQ edit
-You can adjust parameters to edit effects and equalization.

Ball controller
-Touch and drag in ball controller to modulate the sound by simultaneously changing multiple parameters based on the ball position.

Step sequencer
-We can store the ball position in the currently selected scene box.
Arpeggiator and chord pads
-You can play Arpeggiator and Chord pads in addition to keyboard with various scales.

What's MX BK/BU/WH series? Find more here:

-Compatible with Audio Bus、Audio Unit Extentions

-Compatible devices:
iPhone 5S, 6/6 plus, 6s/6s plus and SE, iPod touch 6th Generation or later, iPad Air 1st Generation or later, iPad mini 2nd Generation or later,iPad Pro

What’s New

Version 1.1.4

Minor bug fixes.

Ratings and Reviews

2.9 out of 5
44 Ratings

44 Ratings

32701 ,

Heavy use with varying degrees of success

I use this app to live record into GarageBand, and it comes in handy for making sound effects. However, just recently I opened the app to discover that the instruments suddenly stop working if you turn off both effect filters in the EFX/EQ module. I used to be able to leave the instruments completely dry so that I could hear the raw sound accurately and make precise adjustments. Now, the program disables instruments completely if the effects are turned off, or even if they’re set to “thru.” I even reinstalled the app and encountered the same problem. Pleas fix this rather serious obstacle.

SunTunes ,

Uh, No

First off, the app in its unlocked state is pretty interesting in its own right, particularly if you've owned a DX7 or similar synth. The supplied patches are 'meh', but will whet your appetite.

The kink comes when you try what's described in the above review. The keyboard specialist at the retailer I visited knew all about the app, but pitched it as something that was slaved to a particular keyboard. Yours. You buy an MX## and you can use the supplied cable to interface with your iOS device and unlock the 250+ additional voices. When I asked him if he could unlock it with a display synth he said no, it wouldn't work apart from that keyboard.

Not to say the app's not cool, just that it's a fail as described above. Likewise not to say I wouldn't get an MX88 later and use this - I own and enjoy lots of YamaStuff.

JMWins ,

Thank you, Yamaha

FM GO Promo
Want the the full version? Here's your chance. First, Download the free version of FM Essential to your iOS device, then visit an authorized Yamaha dealer and connect your iOS device to a Yamaha MX synthesizer to unlock the full version.

There is no purchase required to download FM Essential. Once the full version is downloaded and unlocked, it stays fully enabled on your device – even when the MX is no longer connected! That's right, you can walk out of the store with the full version loaded on your iOS device. But you might want to stay and have some fun playing with the MX and FM Essential!

Update: Take your Apple Camera kit adapter and ask the store to lend you a USB to connect and you will be set! Then have a blast playing the instrument using the phone/keyboard combo on the fly. The sales guy didn't know about the app or the offer, but we both were excited and surprised with the possibilities offered using the app/keyboard combo.

I do not work for Yamaha. But, they should have someone go to stores...


Yamaha Corporation of America
97.5 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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